Rod motifs in neutron scattering in spin ice
Physical Review B - Condensed Matter and Materials Physics
American Physical Society
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Castelnovo, C., & Moessner, R. (2019). Rod motifs in neutron scattering in spin ice. Physical Review B - Condensed Matter and Materials Physics, 99 (121102(R))https://doi.org/10.1103/PhysRevB.99.121102
In classical and quantum spin ice, rodlike features appear in the neutron-scattering structure factor when the pinch points characteristic of classical spin ice get washed out. We show that these features do not indicate the absence of spin correlations between planes perpendicular to the rods. Rather, they arise because neutron scattering is largely insensitive to the three-dimensional correlations which are present throughout. We present two very simple models which exhibit a pristine incarnation of such scattering rods. This provides a physical picture for their appearance, elucidates the role played by monopole excitations, and identifies conditions conducive to their observation.
This work was supported in part by EPSRC Grant No. EP/K028960/1 and EPSRC Grant No. EP/M007065/1 (CC) and by the Deutsche Forschungsgemeinschaft under grants SFB 1143 and EXC 2147 ct.qmat (RM).
External DOI: https://doi.org/10.1103/PhysRevB.99.121102
This record's URL: https://www.repository.cam.ac.uk/handle/1810/290464